ISSN : 1226-0517(Print)
ISSN : 2288-9604(Online)
ISSN : 2288-9604(Online)
Journal of Korean Society for Imaging Science and Technology Vol.20 No.4 pp.39-44
DOI : https://doi.org/10.14226/KSIST.2014.20.4.06
DOI : https://doi.org/10.14226/KSIST.2014.20.4.06
PEDOT:PSS 투명전극의 솔벤트 도핑 농도와 홀 이동층의 두께에 따른 유기태양전지의 특성 연구
Effect of the Solvent Doping Concentration of PEDOT:PSS Transparent Electrodes and the Hole Transport Layer Thickness on the Characteristics of Organic Solar Cells
Abstract
Indium tin oxide (ITO) is the most common transparent electrode for organic solar cells due to itshigh electrical conductivity and transmittance. However, the ITO film significantly increases device costs and itsbrittleness limits the applications in flexible electronics. Here, a highly conductive polymer,poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) is studied as an alternative electrode fororganic solar cells. The effect of solvent doping concentration on the electrical and surface structural properties ofPEDOT:PSS thin films is investigated. It is observed that, with increasing a solvent concentration in PEDOT:PSSfilms, surface roughness of PEDOT:PSS electrodes increases, causing the change of short circuit current densitiesin devices. In addition, a light absorption property at short wavelengths is enhanced by decreasing the thicknessof hole transport layers of organic solar cells.